The best hope for long-term control of HIV infection in an individual likely rests with the resumption of effective HIV-specific immune responses. Intermittent antiretroviral therapy (ART) withdrawal, as an attempt to "immunize" the subject with his/her own active viral quasi-species population, represents an alternative approach to traditional immunization strategies. This study hopes to determine whether intermittent ART withdrawal serves to stimulate HIV-specific immune responses and control of viral replication. This approach will be compared with vaccination with ALVAC-HIV vCP1452. In addition, it is conceivable that intermittent ART withdrawal could boost and broaden the prime response to exogenous vaccine; that will also be studied.